.appNav {
    width: 100%;
    height: 600px;  // 写100%有bug
    background: url('./img/world-map.jpeg') center no-repeat;
    background-size: cover;
    .mapNav {
        font-family: 'Microsoft Yahei';
        border: 0;
        background-color: rgba(0,0,0,0.7);
    }
}

.App {
    text-align: center;
}
.App .mapTooltip {
  background-color: #ff7626;
  border-radius: 100%;
}

.searchDiv {
  margin: 20px 10px 0 10px;
  background-color: white;
  padding: 10px 10px;
}
.searchDiv .btndiv {
  float: right;
  padding-right: 15%;
}